CN108303656B - Battery pack charge-discharge testing device - Google Patents
Battery pack charge-discharge testing device Download PDFInfo
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- CN108303656B CN108303656B CN201810167015.5A CN201810167015A CN108303656B CN 108303656 B CN108303656 B CN 108303656B CN 201810167015 A CN201810167015 A CN 201810167015A CN 108303656 B CN108303656 B CN 108303656B
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 45
- 238000007599 discharging Methods 0.000 claims description 52
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 241000935974 Paralichthys dentatus Species 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The application relates to a battery pack charge-discharge testing device, which comprises a multichannel voltage collector, a current collector, a charge-discharge control circuit, a discharge load, a power interface and a processing device, wherein the processing device is used for receiving the voltage and the total current of each single cell and controlling the charge-discharge control circuit to charge or discharge a battery pack; the multichannel voltage collector is connected with the processing device and the voltage end of each single cell of the battery pack, the current collector is connected with the processing device and the charge and discharge port of the battery pack, and the charge and discharge control circuit is connected with the processing device, the charge and discharge port of the battery pack, the discharge load and the power interface. The voltage of each single battery cell can reflect the state of the single battery cell, so that the internal working state of the battery pack is monitored, and the state of the battery pack is monitored more comprehensively. In addition, the discharge load is used for carrying the discharge current, and the discharge process does not need to use an extra load, so that the use is convenient.
Description
Technical Field
The application relates to the technical field of battery testing, in particular to a battery pack charge-discharge testing device.
Background
The battery pack is a chargeable device composed of a plurality of single battery cells, can activate the active substances in a charging mode after discharging to continue to use, has the advantages of economy and environmental protection, and is widely used. To detect the performance of the battery pack, such as capacity and service life, it is often necessary to perform a charge and discharge test on the battery pack.
The battery pack is subjected to charge and discharge test by a traditional battery charge and discharge motor in a common complete set. In the process of charging and discharging, the battery charging and discharging machine monitors the total voltage and the total current output by the battery pack and controls charging and discharging according to the total voltage and the total current, and the monitoring state is one-sided as the whole total voltage can be reflected.
Disclosure of Invention
Accordingly, it is desirable to provide a battery pack charge/discharge test device capable of more comprehensively monitoring the operation state of the battery pack.
A battery pack charge-discharge testing device, comprising:
the multichannel voltage collector is used for collecting the voltage of each single cell of the battery pack;
a current collector for collecting a total current of the battery pack;
a charge/discharge control circuit for charging or discharging the battery pack;
a discharge load for carrying a discharge current;
a power interface for accessing a voltage;
the processing device is used for receiving the voltage and the total current of each single cell and controlling the charge-discharge control circuit to charge or discharge the battery pack;
the multichannel voltage collector is connected with the processing device and the voltage end of each single battery core of the battery pack, the current collector is connected with the processing device and the charge and discharge port of the battery pack, and the charge and discharge control circuit is connected with the processing device, the charge and discharge port of the battery pack, the discharge load and the power interface.
In the battery pack charge-discharge testing device, the total current of the battery pack is collected through the current collector, and the voltage of each single cell of the battery pack is collected through the multichannel voltage collector, so that the processing device can monitor the total current of the battery pack and the voltage of each single cell, and the charge-discharge control circuit is controlled to adopt a discharge load to assist in discharging or a power interface to assist in charging so as to realize charge-discharge testing. The voltage of each single battery cell can reflect the state of the single battery cell, so that the internal working state of the battery pack is monitored, and the state of the battery pack is monitored more comprehensively. In addition, the discharge load is used for carrying the discharge current, and the discharge process does not need to use an extra load, so that the use is convenient.
Drawings
FIG. 1 is a block diagram of a battery pack charge-discharge test apparatus according to an embodiment;
FIG. 2 is a schematic circuit diagram of a controller according to one embodiment;
FIG. 3 is a schematic diagram of a switching control circuit according to an embodiment;
FIG. 4 is a schematic diagram of a charge-discharge switching circuit according to an embodiment;
FIG. 5 is a schematic diagram of a level shifter according to one embodiment;
fig. 6 is a block diagram illustrating a battery pack charge/discharge test apparatus according to another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a battery pack charge and discharge testing apparatus is provided, which includes a multi-channel voltage collector 110 for collecting voltages of individual cells of a battery pack 200, a current collector 120 for collecting total current of the battery pack 200, a charge and discharge control circuit 130 for charging or discharging the battery pack 200, a discharge load 140 for carrying a discharge current, a power interface 150 for accessing a voltage, and a processing device 160 for receiving the voltages and the total current of the individual cells and controlling the charge and discharge control circuit 130 to charge or discharge the battery pack 200.
The multi-channel voltage collector 110 is connected with the processing device 160 and the voltage end of each single cell of the battery pack 200, and collects the voltage of each single cell of the battery pack 200 and outputs the voltage to the processing device 160. Specifically, the multi-channel voltage collector 110 has multiple data lines, and each data line is connected to a voltage terminal of a single cell to collect voltage.
The current collector 120 is connected to the processing device 160 and the charge/discharge port of the battery pack 200, and collects the total current of the battery pack 200 and outputs the total current to the processing device 160. Specifically, the charge and discharge ports of the battery pack 200 include a total input end and a total output end, and the voltage ends of the individual cells are connected to the total input end and the total output end; the current collector 120 may be connected to the main input terminal or the main output terminal.
The charge/discharge control circuit 130 connects the processing device 160, the charge/discharge port of the battery pack 200, the discharge load 140, and the power interface 150. The processing device 160 may send a charging instruction or a discharging instruction to the charging/discharging control circuit 130, where the charging/discharging control circuit 130 receives the charging instruction, uses the voltage accessed by the power interface 150 and outputs the voltage to the battery pack 200, so as to perform charging; upon receiving the discharge command, the charge/discharge control circuit 130 discharges the current discharged from the battery pack 200 to the discharge load 140.
In the above-mentioned battery pack charge-discharge testing device, the total current of the battery pack 200 is collected by the current collector 120, and the voltages of the individual cells of the battery pack 200 are collected by the multi-channel voltage collector 110, so that the processing device 160 can monitor the total current of the battery pack 200 and the voltages of the individual cells, and control the charge-discharge control circuit 130 to perform charge-discharge testing by using the discharge load 140 to perform auxiliary discharge or using the power interface 150 to perform auxiliary charge. Because the voltage of each single cell can reflect the state of a single cell, the internal working state of the battery pack is monitored, and the state monitoring of the battery pack 200 is more comprehensive. In addition, the discharge load 140 carries the discharge current, so that an additional load is not needed in the discharge process, and the use is convenient.
Specifically, the processing device 160 may send a discharge instruction to the charge/discharge control circuit 130 to control the discharge of the battery pack 200 when the voltage difference between the unit cells is less than or equal to a preset voltage difference and the battery capacity calculated according to the total current is greater than a first preset capacity. The processing device 160 may send a charging instruction to the charging/discharging control circuit 130 to control the charging of the battery pack 200 when the voltage difference between the unit cells is less than or equal to a preset voltage difference and the battery capacity calculated according to the total current is less than a second preset capacity. The first preset capacity is smaller than the second preset capacity. Thus, the voltage difference between the single battery cells in the charging and discharging process of the battery pack 200 can be ensured not to be too large, and the continuous discharging when the battery capacity is low and the continuous charging when the battery capacity is high can be avoided, so that the over-discharging and over-charging of the single battery cells can be avoided, and the service life of the battery pack is prevented from being reduced.
In one embodiment, the multi-channel voltage collector 110 is a 24-way voltage patrol unit. The 24-channel voltage inspection unit has a plurality of sampling channels and high precision, and is convenient for measuring the voltage of the single battery cell. It will be appreciated that in other embodiments, the multi-channel voltage collector 110 may be of other types.
In one embodiment, the charge-discharge control circuit 130 includes a controller, a switching control circuit, and a charge-discharge switching circuit. The controller is connected to the processing device 160 and the switching control circuit, and the charge-discharge switching circuit is connected to the switching control circuit, the charge-discharge port of the battery pack 200, the discharge load 140, and the power interface 150.
The controller receives a discharging command or a charging command sent by the processing device 160 and sends a signal to the switching control circuit, and the switching control circuit controls the charging/discharging switching circuit to operate in a discharging mode or a charging mode. In the discharging mode, the current output from the battery pack 220 flows to the discharging load 140 through the charge-discharge switching circuit; in the charging mode, the voltage connected to the power interface 150 is output to the charge-discharge switching circuit, and the charge-discharge switching circuit outputs the voltage to the battery pack 200. By adopting the controller, the switching control circuit and the charge-discharge switching circuit, the structure is simple and the charge-discharge switching is convenient.
In one embodiment, referring to fig. 2, the controller includes a single-chip microcomputer U2, a first peripheral circuit 1311 and a second peripheral circuit 1312, the first peripheral circuit 1311 and the second peripheral circuit 1312 are connected to the single-chip microcomputer U2, and the single-chip microcomputer U2 is connected to the switching control circuit and the processing device 160. In this embodiment, the singlechip uses 89C52 chips. Specifically, the first peripheral circuit 1311 is connected to the pin 9 of the single chip microcomputer U2 through a REST end.
In one embodiment, the switching control circuit includes a plurality of control units including a transistor, a control relay, a diode, a first resistor, and a second resistor. The control end of triode passes through first resistance connection director, and the external power supply of input of triode, and second resistance one end, the negative pole and the control relay of diode are connected to the output of triode, and the positive pole ground connection of second resistance other end and diode, control relay connection charge-discharge switching circuit.
The charging and discharging switching circuit is switched and controlled according to the signals of the controller by adopting the triode, the control relay, the diode, the first resistor and the second resistor, and the charging and discharging switching circuit is simple in structure and easy to realize.
Specifically, the switching control circuit comprises 6 control units, and each control unit is connected with the controller and the charge-discharge switching circuit. Referring to fig. 3, in the present embodiment, taking one of the control units 1321 as an example, it includes a first resistor R2, a second resistor R3, a diode D8, a transistor Q1, and a control relay J1; one end of a coil of the control relay J1 is connected with the output end of the triode Q1, and the other end of the coil is grounded; the static contact of the control relay J1 is connected with a 24V power supply, one movable contact is connected with a charge-discharge switching circuit through a pin 1, and the other movable contact can be suspended; the first resistor R2 is connected with the controller through the P00 terminal. The control relay of the second control unit is J2, the control relay of the third control unit is J3, the control relay of the fourth control unit is J4, the control relay of the fifth control unit is J5, and the control relay of the sixth control unit is J6. The second control unit to the sixth control unit are respectively connected with the controller through a P01 end, a P02 end, a P03 end, a P04 end and a P05 end, and are connected with the charge-discharge switching circuit through a pin 2, a pin 3, a pin 4, a pin 5 and a pin 6.
In one embodiment, the control unit further comprises an LED, the second resistor being grounded through the LED. By adopting the LED to perform state indication, the use convenience is high.
In one embodiment, a charge-discharge switching circuit includes a switching unit, a discharge unit, and a charge unit. The switching unit is connected with a charging and discharging port of the battery pack 200, the discharging unit is connected with the discharging load 140, the charging unit is connected with the power interface 150, and the switching unit, the discharging unit and the charging unit are all connected with the switching control circuit; the switching control circuit controls the switching unit to switch on the discharging unit or to switch on the charging unit. When the switching unit is connected with the discharging unit, the charging and discharging switching circuit works in a discharging mode, and when the switching unit is connected with the charging unit, the charging and discharging switching circuit works in a charging mode.
By adopting the switching unit to fixedly connect the charge and discharge port of the battery pack 200 and the switching control circuit, the discharging unit or the charging unit is connected under the control of the switching control circuit to realize discharging and charging respectively, and the switching is convenient.
Specifically, the switching unit is connected with a first control unit and a second control unit in the switching control circuit, the discharging unit is connected with a third control unit and a fourth control unit in the switching control circuit, and the charging unit is connected with a fifth control unit and a sixth control unit in the switching control circuit. The switching unit, the discharging unit and the charging unit are controlled by adopting a plurality of control units respectively, so that the switching is convenient.
In one embodiment, the switching unit, the discharging unit and the charging unit each comprise two relays, and each relay is connected to the switching control circuit. Referring to fig. 4, two relays J7 and J8 of the switching unit are connected to the charge and discharge port of the battery pack 200, and a first relay J7 of the switching unit is connected to a first relay J9 of the discharge unit and a first relay J11 of the charging unit; the second relay J8 of the switching unit is connected with the second relay J10 of the discharging unit and the second relay J12 of the charging unit; two relays of the discharging unit are respectively connected with two ends of the discharging load 140, and two relays of the charging unit are respectively connected with the power interface 150.
In the present embodiment, the switching control circuit controls the discharge unit to turn on or off the discharge load 140, thereby turning on or off the discharge unit; the switching control circuit controls the charging unit to be turned on or off the power interface 150, thereby turning the switching unit on or off the charging unit.
Specifically, two relays J7 and J8 of the switching unit are connected to the total input terminal and the total output terminal of the charge-discharge port, respectively. Referring to fig. 3 and 4, coils of two relays J7 and J8 of the switching unit are connected at one end to a switching control circuit and at the other end to the ground; in this embodiment, the coil of the relay J7 is connected to a first control unit including the relay J1 through the pin 1, and the relay J8 is connected to a second control unit including the relay J2 through the pin 2. The stationary contacts of the relays J7 and J8 are connected with the total input end and the total output end of the battery pack 200 through the B+ end and the B-end respectively; one movable contact of the relay J7 is connected with a fixed contact of the relay J9 of the discharging unit and a fixed contact of the relay J11 of the charging unit; one movable contact of the relay J8 is connected to a stationary contact of the relay J10 of the discharging unit and a stationary contact of the relay J12 of the charging unit. One movable contact of a relay J9 of the Discharge unit is connected with one end of the Discharge load 140 through a discharge+ and the other movable contact can be suspended; one movable contact of the relay J10 of the Discharge unit is connected with the other end of the Discharge load 140 through a Discharge-and the other movable contact can be suspended; one end of a coil of a relay J9 of the discharging unit is connected with a third control unit comprising the relay J3 through a pin 3, and the other end of the coil is grounded; the relay J10 of the discharge unit is connected with a fourth control unit comprising the relay J4 through a pin 4, and the other end is grounded. One movable contact of the relay J11 of the charging unit is connected with the positive electrode/negative electrode of the power interface 150 through charge+, and the other movable contact can be suspended; one movable contact of the relay J12 of the charging unit is connected with the negative electrode/positive electrode of the power interface 150 through the Charge, and the other movable contact can be suspended. One end of a coil of a relay J11 of the charging unit is connected with a fifth control unit comprising the relay J5 through a pin 5, and the other end of the coil is grounded; one end of a coil of a relay J12 of the charging unit is connected with a sixth control unit comprising the relay J6 through a pin 6, and the other end of the coil is grounded.
In one embodiment, the charge-discharge switching circuit further includes a fuse through which the switching unit is connected to the charge-discharge port of the battery pack 200. By adding the fuse, the working safety of the circuit can be improved. For example, referring to fig. 4, the second relay J8 of the switching unit is connected to the total output terminal through the FUSE 2.
In one embodiment, the charge-discharge control circuit 130 further includes a level shifter, through which the controller is coupled to the processing device 160. The signal level of the processing device 160 may be different from the signal level of the controller, and the level conversion is performed by the level converter, so that the processing device 160 and the controller can communicate with each other conveniently.
Specifically, in this embodiment, the level shifter employs a MAX232 chip. Referring to fig. 5, the max232 chip is connected to the processing device 160 through an RS232 interface, and is connected to the pin 10 and the pin 11 of the singlechip in fig. 2 through a P30 end and a P31 end, respectively.
In one embodiment, current collector 120 includes a digital multimeter connected to both ends of the third resistor and to processing device 160 and a third resistor through which the charge-discharge switching circuit is connected to the charge-discharge port of battery pack 200.
Through adopting the third resistance to connect the charge and discharge port, the current that flows through the third resistance can be measured to the digital multimeter connection third resistance both ends to obtain the total current of battery package 200, simple structure and measurement convenience. For example, the digital multimeter can be a FLUKE 8845 model digital multimeter with high precision. In this embodiment, the third resistor has a resistance of 10mΩ (milliohm).
Specifically, referring to fig. 4, the second relay J8 of the switching unit is connected to the charge and discharge port of the battery pack 200 through the third resistor R8. It will be appreciated that in other embodiments, the first relay J7 of the switching unit may be connected to the charge/discharge port of the battery pack 200 through the third resistor.
To better illustrate the operation mechanism of the charge/discharge control circuit 130, the charge command and the discharge command sent by the processing device 160 are level signals, as described with reference to fig. 2, 3, 4, and 5; taking the example that the high level signal represents the charge command and the low level signal represents the discharge command:
the level converter receives the high-level signal sent by the processing device 160 and converts the high-level signal into a converted level signal, and the level signal is sent to the singlechip U2, and the singlechip U2 sends the level signal to the P00 end, the P01 end, the P02 end, the P03 end, the P04 end and the P05 end, so that the states of the control relay J1, the control relay J2, the control relay J3, the control relay J4, the control relay J5 and the control relay J6 are respectively opened, disconnected and closed; at this time, the relay J7 and the relay J8 are closed, the relay J9 and the relay J10 are opened, the relay J11 and the relay J12 are closed, that is, the stationary contacts of the relay J7 and the relay J8 are respectively connected with the movable contact of the a end, the relay J9 and the relay J10 are not connected with the discharge load 140, the relay J11 and the relay J12 are connected with the power interface 150, and thus the battery pack 220, the switching unit, the charging unit and the power interface 150 are sequentially connected, and the charge-discharge switching circuit operates in the charge mode.
The level converter receives the low-level signal sent by the processing device 160 and converts and sends the converted level signal to the singlechip U2, and the singlechip U2 sends the level signal to the P00 end, the P01 end, the P02 end, the P03 end, the P04 end and the P05 end, so that the states of the control relay J1, the control relay J2, the control relay J3, the control relay J4, the control relay J5 and the control relay J6 are respectively opened, disconnected, closed and disconnected; at this time, the relay J7 and the relay J8 are closed, the relay J9 and the relay J10 are closed, the relay J11 and the relay J12 are opened, that is, the stationary contacts of the relay J7 and the relay J8 are respectively connected with the movable contact of the a end, the relay J9 and the relay J10 are connected with the discharge load 140, the relay J11 and the relay J12 are not connected with the power interface 150, so that the battery pack 220, the switching unit, the discharge unit and the discharge load 140 are sequentially connected, and the charge-discharge switching circuit operates in the discharge mode.
In one embodiment, the charge and discharge control circuit 130 disconnects the battery pack 200 when it does not receive the charge or discharge command sent by the processing device 160 within a preset period of time. In this way, when the processing device 160 is in a dead halt or abnormal exit condition, the battery pack 200 is cut off in time, so that the safety of the battery pack 200 is ensured, and the battery pack 200 is prevented from being damaged. Specifically, the single-chip microcomputer U2 may send a signal to the switching control circuit to close the control relay and the relays in the switching unit, the discharging unit and the charging unit, thereby disconnecting the battery pack 200 from the discharging load 140.
In one embodiment, the discharge load 140 is a resistor.
In one embodiment, the processing device 160 is a host computer. The upper computer receives and stores the received voltage of each single cell and the total current of the battery pack. And the test data are stored and recorded, so that the user can check the test data conveniently.
In one embodiment, referring to fig. 6, the battery pack charge-discharge testing apparatus further includes a multi-channel temperature collector 170, where the multi-channel temperature collector 170 is connected to the plurality of unit cells of the battery pack 200 and the processing device 160. Specifically, the multi-channel temperature collector 170 may be all the unit cells connected to the battery pack 200, or may be part of the unit cells connected to the battery pack 200, which is determined according to measurement requirements.
The temperature distribution condition of the battery pack 200 can be more comprehensively known by measuring the temperatures of a plurality of single batteries by adopting the multi-channel temperature collector 170, and the multi-channel temperature collector 170 is adopted without a plurality of devices, so that the structure is simple. For example, the multi-channel temperature harvester 170 may employ a temperature harvester model AT 4516.
In one embodiment, the multi-channel voltage collector 110, the current collector 120, the charge-discharge control circuit 130 and the multi-channel temperature collector 170 are all connected to the processing device 160 through serial ports, which is convenient for disassembly and assembly.
In one embodiment, with continued reference to fig. 6, the battery pack charge-discharge testing apparatus further includes a power module 180 coupled to the power interface 150. The power module 180 is used for supplying power, and has high convenience in use.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A battery pack charge-discharge test device, comprising:
the multichannel voltage collector is used for collecting the voltage of each single cell of the battery pack;
a current collector for collecting a total current of the battery pack;
a charge/discharge control circuit for charging or discharging the battery pack;
a discharge load for carrying a discharge current;
a power interface for accessing a voltage;
the processing device is used for receiving the voltage and the total current of each single cell and controlling the charge-discharge control circuit to charge or discharge the battery pack; the processing device is used for controlling the discharge of the battery pack through the charge and discharge control circuit when the voltage difference between every two single battery cells is smaller than or equal to a preset voltage difference and the battery capacity obtained through calculation according to the total current is larger than a first preset capacity; when the voltage difference between every two single battery cores is smaller than or equal to a preset voltage difference and the battery capacity obtained by calculation according to the total current is smaller than a second preset capacity, the charging and discharging control circuit controls the battery pack to charge;
the multichannel voltage collector is connected with the processing device and the voltage end of each single battery core of the battery pack, the current collector is connected with the processing device and the charge and discharge port of the battery pack, and the charge and discharge control circuit is connected with the processing device, the charge and discharge port of the battery pack, the discharge load and the power interface;
the charge-discharge control circuit comprises a charge-discharge switching circuit, a switching control circuit and a controller, wherein the controller is connected with the processing device and the switching control circuit, and the charge-discharge switching circuit is connected with the switching control circuit, a charge-discharge port of the battery pack, the discharge load and the power interface;
the switching control circuit comprises a plurality of control units, wherein each control unit comprises a triode, a control relay, a diode, a first resistor and a second resistor;
the control end of the triode is connected with the controller through the first resistor, the input end of the triode is externally connected with a power supply, the output end of the triode is connected with one end of the second resistor, the cathode of the diode and the control relay, the other end of the second resistor is grounded with the anode of the diode, and the control relay is connected with the charge-discharge switching circuit.
2. The battery pack charge-discharge testing device of claim 1, further comprising a multi-channel temperature collector connecting the processing device and a plurality of individual cells of the battery pack.
3. The battery pack charge-discharge test device of claim 1, wherein the control unit further comprises an LED, the second resistor being grounded through the LED.
4. The battery pack charge-discharge testing device according to claim 1, wherein the charge-discharge switching circuit comprises a switching unit, a discharging unit, and a charging unit;
the switching unit is connected with a charging and discharging port of the battery pack, the discharging unit is connected with the discharging load, the charging unit is connected with the power interface, and the switching unit, the discharging unit and the charging unit are all connected with the switching control circuit; the switching control circuit controls the switching unit to switch on the discharging unit or the charging unit.
5. The battery pack charge-discharge test device according to claim 4, wherein the switching unit, the discharging unit, and the charging unit each include two relays, and each relay is connected to the switching control circuit;
the two relays of the switching unit are connected with the charge and discharge port of the battery pack, the first relay of the switching unit is connected with the first relay of the discharge unit and the first relay of the charging unit, the second relay of the switching unit is connected with the second relay of the discharge unit and the second relay of the charging unit, the two relays of the discharge unit are respectively connected with two ends of the discharge load, and the two relays of the charging unit are respectively connected with the power interface.
6. The battery pack charge-discharge testing device according to claim 1, wherein the charge-discharge control circuit further comprises a level shifter, and the controller is connected to the processing device through the level shifter.
7. The battery pack charge-discharge testing device according to claim 1, wherein the current collector comprises a digital multimeter and a third resistor, the charge-discharge switching circuit is connected with the charge-discharge port of the battery pack through the third resistor, and the digital multimeter is connected with two ends of the third resistor and is connected with the processing device.
8. The battery pack charge and discharge testing device of claim 1, further comprising a power module coupled to the power interface.
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| CN201810167015.5A CN108303656B (en) | 2018-02-28 | 2018-02-28 | Battery pack charge-discharge testing device |
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| CN201810167015.5A CN108303656B (en) | 2018-02-28 | 2018-02-28 | Battery pack charge-discharge testing device |
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| CN109507601A (en) * | 2018-08-16 | 2019-03-22 | 杭州容大智造科技有限公司 | A kind of battery pack monitoring device and system |
| CN112336444A (en) * | 2019-08-06 | 2021-02-09 | 深圳钮迈科技有限公司 | Charge-discharge monitoring circuit and tumor therapeutic instrument |
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| CN207867001U (en) * | 2018-02-28 | 2018-09-14 | 长沙优力电驱动系统有限公司 | Battery pack charge-discharge testing device |
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2018
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|---|---|---|---|---|
| JP2001231178A (en) * | 2000-02-15 | 2001-08-24 | Shin Kobe Electric Mach Co Ltd | Controller for battery set, modular battery unit, modular battery and method for controlling battery set |
| CN202772619U (en) * | 2012-08-03 | 2013-03-06 | 安徽力高新能源技术有限公司 | Circuit with automatic charging/discharging protection function |
| CN105730718A (en) * | 2016-05-10 | 2016-07-06 | 中国人民解放军国防科学技术大学 | Multifunctional structure lithium battery system power management unit for spacecraft |
| CN106786964A (en) * | 2017-01-16 | 2017-05-31 | 祁国俊 | Battery bag charge-discharge control circuit and power battery system of electric vehicle |
| CN206960628U (en) * | 2017-08-11 | 2018-02-02 | 北京智芯微电子科技有限公司 | A kind of integrated data acquisition unit for battery management system |
| CN207867001U (en) * | 2018-02-28 | 2018-09-14 | 长沙优力电驱动系统有限公司 | Battery pack charge-discharge testing device |
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| CN108303656A (en) | 2018-07-20 |
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